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Synthesis and luminescent properties of novel BaGd 2 O 4 :Eu 3+ scintillating phosphor
Author(s) -
Sun XinYuan,
Wang WenFeng,
Sun ShouQiang,
Lin LiangWu,
Li DeYi,
Zhou LingPing
Publication year - 2012
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2394
Subject(s) - phosphor , photoluminescence , thermoluminescence , luminescence , analytical chemistry (journal) , ion , scanning electron microscope , materials science , photoluminescence excitation , spectral line , chemistry , physics , optoelectronics , organic chemistry , chromatography , astronomy , composite material
BaGd 2‐ x O 4 : x Eu 3+ and Ba 1‐ y Gd 1.79‐2 y Eu 0.21 Na 3 y O 4 phosphors were synthesized at 1300°C in air by conventional solid‐state reaction method. Phosphors were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence excitation (PLE) spectra, photoluminescence (PL) spectra and thermoluminescence (TL) spectra. Optimal PL intensity for BaGd 2‐ x O 4 : x Eu 3+ and Ba 1‐ y Gd 1.79‐2 y Eu 0.21 Na 3 y O 4 phosphors at 276 nm excitation were found to be x = 0.24 and y = 0.125, respectively. The PL intensity of Eu 3+ emission could only be enhanced by 1.3 times with incorporation of Na + into the BaGd 2 O 4 host. Enhanced luminescence was attributed to the flux effect of Na + ions. However, when BaGd 2 O 4 :Eu 3+ phosphors were codoped with Na + ions, the induced defects confirmed by TL spectra impaired the emission intensity of Eu 3+ ions. Copyright © 2012 John Wiley & Sons, Ltd.